Vehicle-spring shackle.



L 1. CRAWFGHD.

VEHICLE SPRING SHACKLE. APPLICATION FILED AUG-12,1915.

I IMMIHM, P. I

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John J Crawford ATTORNEYS 1,185,7. Patente i i May 30, 1916.

JOHN J. CRAWFORD, CF NEW YORK, N. Y.

VEHICLE-SPRING SHAGKLE.

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Specification of Letters Patent.

Patcnted'liiay 30., T9316.

\ Application filed August 12, 191.5. Serial No. 45,143.

To all whom it may concern Be it known that 1, JOHN J. CRAWFORD, a citizen of the United States, and a resident of the city of New York, West New Brighton, borough of Richmond, in the county of Richmond and State of New York,

' have invented a new and Improved Vehicle-Spring Shackle, of which the following is a full, clear, and exact description.

. Among the principal objects which the present invention has in view are: to pro vide a relatively sensitive resilient connection -for the ends'of leaf springs for absorbing the minor vibrations and for preventing of the character mentioned formed as a single the snapping of the top leaf incident to the lift or" a vehicle body; to provide a shackle unit, simple in design and easily applied; to provide a shackle of the character mentioned shaped to replace the conventional link shackle, thereby avoiding the necessity V for special parts or alterations in the construction of conventional parts.

Dmwmgs.-F1gure 1 1s a side view of a fragment of an automobile chassis, a frag- ,ment of a carrying spring therefor, and a shackle connecting the sameconstructed and arranged in accordance with the present iii-- vention; and Fig. 2 is a top view of-tlw shackle so constructed.

Deacflptiom-As seen in the drawings, a bracket 7 is rigidly mounted upon a sidebar 8 of an automobile chassis. The bracket and chassis disclosed are of conventional form and manufacture. The top leaf of spring 9 is constructed to receive the shackle bolt 10. A- similar bolt 11 is mounted in bearings formed in the bracket 7 Conventionally,

the bolts 10 and 11 form pivot connecting members for rigid shackle link. In accordance with the present invention, these bolts perform the same oflice for the bowed spring shackle 12. 1

The shackle 12 is constructed from finely tempered spring steel. The size and cross section of the body of the spring is designed according to the installation and in accordande with the calculated weight to be sus pended on the springs, such as 9. The ends of the shackle 12 are yoked to form hinge knuckles 13. The knuckles 13 are suitably perforated to receive the bolts 10 and 11 and to straddle the ends of the'top leaf of the spring 9 and the lower end of the bracket 7 In each installation, the load compression of the shackle 12 is estimated and provided for. The bending moment of the shackle 12 is designed to a lower stress than the spring 9. Consequently the vibration of the spring 9 occasionedby the road is absorbed by the shackle 12. Also when the wheel is suddenly elevated by the road, the spring 9 compresses the shackle 12 to a point'where the bending stress of the said shackle equals the bending stress of the spring 9, before the spring 9 is deflected. In this manner the carrying spring 9 is relieved of a large portion of the road shock. When, on the ments with which said shackle is operatively connected. 1

Inwitness whereofl have signed my name i 'to this specification 1n the presence-of two subscribing witnesses.

J OHN J. CRAWFORD.

Witnesses W. M. BRAMAN, FRANK PALUMBO.

other hand, the axle and chassis are forced 

